Is there a web site that lists data such as ft/lbs energy at 100 yds, velocity at 100 yds for various pistol and rifle calibers?

There are several bal. programs that allow you to figure this out. It will change w/ the bullets BC (bal. coefficency). High er BC bullets hold onto their vel. longer & prduce higher energy at impact, but really only useful after 300yds IMO.

Most ammo mfr have ballistics charts on their website

I like this one

click here

I use JBM - Calculations the most. Looks pretty similar to vapodog's one. With JBM, bullets can be selected from a list. It also allows for altitude, humidity and so on. It does give game size and time of flight and things. It's just the first one I started using and it works for me so I use it the most.